发明名称 |
Camshaft position measurement and diagnosis |
摘要 |
A method of operating an engine includes determining a relative position between a first camshaft and a second camshaft during a startup event of the engine when the first camshaft is at a first home position and the second camshaft is at a second home position. The first home position is a first preset angular position of the first camshaft relative to a crankshaft. The second home position is a second preset angular position of the second camshaft relative to the crankshaft when the engine is in an OFF state. The method includes generating a first estimate of the first home position. The method also includes diagnosing a mis-build of the engine based on the relative position, the first estimate and a second estimate of the second home position.
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申请公布号 |
US7984644(B2) |
申请公布日期 |
2011.07.26 |
申请号 |
US20090541463 |
申请日期 |
2009.08.14 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS LLC |
发明人 |
BAGNASCO ANDREW P;CINPINSKI KENNETH J. |
分类号 |
G01M15/06 |
主分类号 |
G01M15/06 |
代理机构 |
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